[1]   2013.6 to  Now
Peking University
Senior engineer, School of physics, Peking University 
[2]   2008.8  to  2013.7
Peking University
Peking University, School of physics, engineer 
[3]   2005.10  to  2007.4
Peking University
Visiting scholar, desy 
[4]   2005.7  to  2008.7
Peking University
Assistant engineer, School of physics, Peking University